yii2:drop-down list for multiple values concat in one line

Question

for my drop-down list I am using this code.

field($medicinerequest, \'[\' . $id . \']\' . \'medicine_name\')
->DropDownList(ArrayHelper::         


        

Answer 1

ArrayHelper::map($array, $from, $to, $group) uses ArrayHelper::getValue() to obtain the values of $from, $to and $group. ArrayHelper::getValue() allows you to pass closures.

The anonymous function signature should be: function($array, $defaultValue).

As such you can set $to as

ArrayHelper::map(
    \app\models\Medicine::find()->asArray()->all(),
    'id',
    function($model) {
        return $model['medicine_name'].'-'.$model['medicine_id'];
    }
)